![r+18=26](https://img.qammunity.org/2023/formulas/mathematics/college/rsn6uyb9v16q50coi4yri6704a1bzyb0yr.png)
To solve this equatio you use the next property:
Subtraction Equal Property: it is used in expressions with adds. State that you can substract the same amount from both sides of the equation and maintain euality.
In this case, to solve r you substract 18 in both sides of the equation:
![r+18-18=26-18](https://img.qammunity.org/2023/formulas/mathematics/college/e9tcd0n8y7f4tmlpwrs334oxl07rev5m9h.png)
As 18-18 is 0;
![r=8](https://img.qammunity.org/2023/formulas/mathematics/college/rtjbjt9xqsate5cdac6j1xl15dfmurnimq.png)
Then, The solution of r+18=26 is r=8